Figure 4From: The surface protein Shr of Streptococcus pyogenes binds heme and transfers it to the streptococcal heme-binding protein ShpSpectral evidence for that Shr binds heme. Presented are the spectra of 15 μM Shr isolated (black solid curve), treated with 50 μM ferricyanide (red curve), and reduced by excess dithionite (dashed line) in 20 mM Tris-HCl, pH 8.0.Back to article page